Tap and hold On/Off until your mobile phone is turned on.
Step 2 of 5
If your SIM is locked, tap Unlock.
Step 3 of 5
Key in your PIN and tap OK. The default PIN is 1234.
If an incorrect PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting Customer Service. Please note: If an incorrect PUK is entered ten times in a row, your SIM is blocked permanently. In this case, you'll need a new SIM from Singtel.